if it was the 3.6 theres no way you woulda "walked" it plain and simple. it was a four banger, or that wonderful 3.5 thats a complete dog. The 3.6 vvt motor will be dead even with you, possibly pull in the higher rpms seeing as they wind out forever. My aunt just got a 2012 impala with it in it, when your in tap shift you can wind it out 7k rpm before it hits the limiter and it pulls the whole time